- Class: Primary 6
- Term: 1st Term
- Week: 3
- Age: 11 years
- Duration: 40 minutes
- Subject: Basic Science And Technology
- Curriculum Theme: Basic Technology
- Previous Lesson: Colour: Secondary Colours
- Topic: Colour Separation
- Content: Components of Colour Separation
Performance Objectives:
By the end of the lesson, pupils should be able to:
- Cognitive Domain: Identify and explain the components of colour separation.
- Affective Domain: Appreciate the role of colour separation in various applications.
- Psychomotor Domain: Demonstrate the process of separating colours using simple tools.
- Social Domain: Work cooperatively in groups to discuss and apply colour separation techniques.
Reference Materials:
The following resources were used in planning this lesson:
- 9 – Years Basic Education Curriculum
- Abuja Educational Resource Centre Scheme of Work
- NAPPS National Unified Scheme of Work
- Online Information from Britannica – Colour separation process | printing
- Relevant Textbooks
Instructional Materials:
The teacher will teach this lesson with the aid of:
- Colour separation charts
- Markers and paper
- Simple filter paper or chromatography strips
- Beakers and water
- Example images of colour separation techniques
Rationale for the Lesson:
Understanding colour separation is essential as it plays a crucial role in various fields such as printing, art, and science. This knowledge helps in creating vibrant images and ensuring accurate reproduction of colours in different media.
Prerequisite/Previous Knowledge:
Pupils should be familiar with primary and secondary colours and their mixing. They should also have basic experience with simple science experiments.
INSTRUCTIONAL PROCEDURES:
Learning Area: Colour Separation
To deliver this lesson, the teacher will adopt the following steps:
| Content Development | Time | Teaching Method | Teaching Strategy | Teacher’s Activity | Pupils’ Activity | Learning Point |
|---|---|---|---|---|---|---|
| Step 1: Introduction | 5 mins | Interactive Discussion | Visual aids, questioning | Introduce the concept of colour separation and its importance. Show examples. | Listen and ask questions about colour separation. | Understanding the basic concept of colour separation. |
| Step 2: Explanation | 10 mins | Lecture & Demonstration | Visual examples, demonstration | Explain the components of colour separation: White light is made up of the colours ROYGBIV. Demonstrate the separation using a prism or relate to rainbows. | Observe the demonstration and take notes. | Learning the components of white light colour separation. |
| Step 3: Group Activity | 10 mins | Group Work | Hands-on practice | Divide pupils into groups and provide materials. Guide them through a simple colour separation experiment. | Perform the experiment, observe results, and discuss in groups. | Application of colour separation techniques. |
| Step 4: Note Taking | 5 mins | Guided Note Taking | Writing, summarization | Summarize key points of the lesson and have pupils write them down. | Write down the summary and important points. | Reinforcing knowledge through note-taking. |
| Step 5: Evaluation | 5 mins | Q&A Session | Questioning, feedback | Ask questions to assess pupils’ understanding of the lesson content. | Answer questions and participate in discussion. | Assessing understanding and clarifying doubts. |
| Step 6: Conclusion | 5 mins | Recap & Feedback | Summarization, feedback | Recap the lesson’s main points and provide feedback. | Review the key points of the lesson and provide feedback. | Consolidating learning and ensuring comprehension. |
Lesson Content
Colour Separation – Components of Colour Separation
What is Colour Separation?
Colour separation is the process of breaking down white light into its individual colours. This is important for understanding how we see colours in the world around us.
Colour Models
There are two colour models, namely RGB (Red, Green, Blue) and RYB (Red, Yellow, Blue) colours.
RGB (Red, Green, Blue) Colour Models: The RGB model is commonly used in devices like TVs, computers, and phones (devices that emit/produce light). By combining different amounts of these three colours, we can create a wide range of other colours. When all three colours are mixed at full intensity, they produce white light.
RYB (Red, Yellow, Blue) Colour Models: This model is often used in painting and art. These are the primary colours that can be mixed to create other colours, but they cannot be made by mixing other colours together.
White Light and Its Components:
What we see as white light (like the Sun or energy bulbs) is actually made up of multiple colours blended together. When separated, these colours reveal the spectrum of light (the seven colours of a rainbow) that makes up what we see as white, which can be remembered using the acronym ROYGBIV.
ROYGBIV
The colours in white light can be remembered as:
- Red
- Orange
- Yellow
- Green
- Blue
- Indigo
- Violet
These colours are often seen when light passes through a prism or in a natural phenomenon like a rainbow.
How to Separate Colours
White light can be separated using a prism.
A prism is a triangular piece of glass or plastic that can bend (refract) light. When white light enters the prism, it is split into its component colours.
Real-Life Example – Rainbow
A rainbow forms when sunlight passes through raindrops in the sky. The raindrops act like tiny prisms, splitting the sunlight into the colours of the spectrum, which we see as a rainbow.
Lesson Evaluation:
To evaluate the learning, the teacher asks pupils to:
- Define colour separation and list its components.
- Describe the process of separating colours using filter paper.
- Explain why colour separation is important in everyday applications.
- Demonstrate a simple colour separation experiment and explain the results.
- Discuss how teamwork was used in the group activity.
Summary
- Colour separation helps us understand how different colours are combined or separated.
- The RGB model is used for light (like on screens), while the RYB model is used for mixing paints.
- White light is made up of the colours ROYGBIV.
- Prisms can separate white light into these colours, similar to how rainbows are created in nature.
